ZN12(ZN72)-40.5 series indoor high voltage vacuum circuit breaker 35kV three- phase AC 50Hz applied to power system, the circuit breaker for the ceramic structure, using the longitudinal magnetic field contacts, is small, the proliferation of breaking arc generated when current distribution in the contact on the same local melting phenomenon does not occur but also has a low arc energy voltage (20-200V) and low chopping current(4-5A)’ and operate with high reliability organizations.
The circuit breaker with spring energy storage sector, can exchange energy storage, or DC operation, can also be used manually.
Technical data
NO | Item | Units | Technical parameters | ||||
1 | Rated voltage | kV | 40.5 | ||||
2 | Rated current | A | 1250 | 1600 | 2000 | ||
3 | Rated short-circuit breaking current | kA | 20 | 31.5 | 25 | 31.5 | |
4 | Dynamic current(peak) | kA | 50 | 80 | 63 | 80 | |
5 | 4S Thernal current | kA | 20 | 31.5 | 25 | 31.5 | |
6 | Rated short-circuit closing current(peak) | kA | 50 | 80 | 63 | 80 | |
7 | Rated short-circuit current breaking times | Times | 20 | ||||
8 | Rated operating sequence | O-0.3s-CO-180s-CO | |||||
9 | Rated insulation level | 1min Frequency voltage | kV | 95 | |||
Lighthning Impulse voltage tolerance(peak) | 185 | ||||||
10 | Mechanical life | Times | 10000 | ||||
11 | Rated single capacitor device ON-OFF current | A | 630 | ||||
12 | Rated single back-to-back capacitor device current | A | 400 | ||||
13 | Rated voltage electrical energy storage | V | AC,DC 110; 120 | ||||
14 | Energy storage power Rating | W | 275 | ||||
15 | Electrical Energy Storage Energy storage time | S | ≤15 | ||||
16 | Hop Tripping coil rated voltage | V | AC,DC 110; 120 | ||||
17 | Hop Tripping coil rated current | A | 1.91(AC),0.89(DC) | ||||
18 | Over-current tripping device rated current | A | 5 | ||||
19 | Contactor opening distance | mm | 25±2 | ||||
20 | Contactor Contact trip | mm | 6±2 | ||||
21 | At the different period of three consistency | ms | ≤2 | ||||
22 | Contact closing bounce time | ms | ≤3 |
ZN12(ZN72,ZN68)-40.5, 40.5 KV series indoor high voltage vacuum circuit breakeror Oil Buffer